EP3804955B1 - Heizvorrichtung für mindestens einen gehäuseabschnitt einer schneckenmaschine sowie verfahren zur instandhaltung einer derartigen heizvorrichtung - Google Patents

Heizvorrichtung für mindestens einen gehäuseabschnitt einer schneckenmaschine sowie verfahren zur instandhaltung einer derartigen heizvorrichtung Download PDF

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Publication number
EP3804955B1
EP3804955B1 EP20191700.2A EP20191700A EP3804955B1 EP 3804955 B1 EP3804955 B1 EP 3804955B1 EP 20191700 A EP20191700 A EP 20191700A EP 3804955 B1 EP3804955 B1 EP 3804955B1
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EP
European Patent Office
Prior art keywords
plug
heating
contact
heating apparatus
supply line
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
EP20191700.2A
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German (de)
English (en)
French (fr)
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EP3804955A1 (de
Inventor
Dieter Helmig
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Coperion GmbH
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Coperion GmbH
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Filing date
Publication date
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Publication of EP3804955A1 publication Critical patent/EP3804955A1/de
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/36—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
    • B29C48/395—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die using screws surrounded by a cooperating barrel, e.g. single screw extruders
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
    • H01R13/66—Structural association with built-in electrical component
    • H01R13/665—Structural association with built-in electrical component with built-in electronic circuit
    • H01R13/6675—Structural association with built-in electrical component with built-in electronic circuit with built-in power supply
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/256—Exchangeable extruder parts
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/36—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
    • B29C48/50—Details of extruders
    • B29C48/68—Barrels or cylinders
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/78—Thermal treatment of the extrusion moulding material or of preformed parts or layers, e.g. by heating or cooling
    • B29C48/80—Thermal treatment of the extrusion moulding material or of preformed parts or layers, e.g. by heating or cooling at the plasticising zone, e.g. by heating cylinders
    • B29C48/83—Heating or cooling the cylinders
    • B29C48/832—Heating
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B1/00—Details of electric heating devices
    • H05B1/02—Automatic switching arrangements specially adapted to apparatus ; Control of heating devices
    • H05B1/0227—Applications
    • H05B1/023—Industrial applications
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B3/00—Ohmic-resistance heating
    • H05B3/02—Details
    • H05B3/06—Heater elements structurally combined with coupling elements or holders

Definitions

  • German patent application 10 2019 215 700.9 is incorporated herein by reference.
  • the invention relates to a heating device for at least one housing section of a screw machine and a screw machine with such a heating device. Furthermore, the invention relates to a method for maintaining such a heating device.
  • an extruder with a housing is known, which is made up of several housing sections.
  • Associated electrical heating devices are arranged on the housing sections.
  • the respective heating device comprises electrical heating elements in the form of resistance heating cartridges, which are arranged in through-holes in the housing section.
  • the heating conductors of the heating elements are led into a liquid-tight connection housing and brought together there on a terminal strip.
  • the connection housing also includes a connection means for a power line, which is in contact with the terminal strip via a contact line.
  • a heating element for dehumidifying damp masonry is known.
  • several heating rods are connected to form a network and connected to a supply line.
  • the object of the invention is to create a heating device for at least one housing section of a screw machine that can be used flexibly and is easy to maintain.
  • a heating device having the features of claim 1. Because the respective connection line is connected to an associated contact plug, which can be electrically connected to an associated plug contact of a plug contact distributor in a simple manner, the respective electrical heating element can be individually connected to a power supply and disconnected again.
  • the at least two contact plugs and the at least two plug-in contacts are each connected to one another mechanically and/or electrically in a reversible manner, that is to say detachable again.
  • the at least two contact plugs and/or the at least two plug contacts are in particular accessible, preferably arranged in a freely accessible manner.
  • the maintenance of the heating device is easy, since a defective electrical heating element can be electrically separated individually from the plug-in contact distributor and replaced with a functional electrical heating element. This can be done by any operator. An electrician is not required to replace a defective heating element.
  • the entire heating device does not have to be dismantled from the associated housing section and a connection housing opened for electrical disconnection, for which purpose an electrician is regularly required.
  • the at least one switching element is preferably part of the supply unit and/or the respective heating unit.
  • the at least one switching element is preferably integrated in the plug-in contact distributor.
  • the heating device comprises, for example, an associated switching element for each plug contact and/or for each electrical heating element, so that the respective heating element can be switched on and off individually, and/or for several plug contacts and/or for several electrical heating elements an associated switching element, so that the multiple heating elements can be switched on and off together.
  • the at least one switching element is designed in particular as an active switching element, for example as a semiconductor relay (solid state relay).
  • the at least one switching element is preferably supplied with electrical energy via the electrical supply line.
  • the respective heating element is mechanically and/or electrically connected to the associated connection line, for example by means of a screw connection, a plug connection or a permanent connection.
  • the plug-in connection is designed, for example, as an angle block and can only be released by means of a pull-off tool.
  • the respective heating element and the associated connection line are preferably fixed, ie mechanically and electrically non-detachably connected to one another.
  • the at least two heating elements are designed, for example, as electrical resistance heating elements or resistance heating cartridges.
  • the at least two connection lines each have a length L, with the following preferably applying: 0.5 m ⁇ L ⁇ 5 m, in particular 1.0 m ⁇ L ⁇ 4 m, in particular 1.5 m ⁇ L ⁇ 3 m. By the length L, the plug-in contact distributor can be arranged at a distance from the at least two heating elements as required.
  • connection lines are in particular permanently connected to the associated contact plugs. This ensures flexible use and easy maintenance.
  • the fixed, ie inseparable, mechanical and electrical connection between the respective connection line and the associated contact plug ensures a high degree of personal protection, so that the respective heating element can also be easily replaced by any operator. An electrician is therefore not required.
  • the respective heating element in particular together with the associated connection line and the associated contact plug, forms a heating unit which forms an exchangeable module of the heating device.
  • the supply line is detachable, for example by means of a screw connection or plug-in connection, or is mechanically and/or electrically connected to the plug-in contact distributor. If the supply line is detachably connected to the plug-in contact distributor, the plug-in contact distributor preferably has two supply line connections. In this way, the supply line of another heating device can be connected to the plug-in contact distributor, so that the plug-in contact distributors are connected in series by means of the supply lines and in this way the energy supply is passed from heating device to heating device.
  • the electrical supply line is designed to be flexible. This ensures flexible use and easy maintenance. Due to the fact that the electrical supply line is designed to be flexible, in particular bendable, a simple line routing and a flexible arrangement of the associated plug-in contact distributor is possible.
  • the plug-in contact distributor is connected to an energy supply via the supply line and can in particular be easily separated from the energy supply, for example by unplugging a supply line contact plug.
  • the at least two electrical heating elements can be flexibly selected as required and assembled to form the heating device.
  • a heating device ensures flexible use and easy maintenance.
  • the fact that the at least two connection lines are designed to be flexible, in particular bendable, enables simple line routing of the at least two connection lines and simple assembly and disassembly of the associated heating elements. Starting from the respective electrical heating element, the associated connection line can be routed to the plug-in contact distributor in the desired manner.
  • a heating device ensures flexible use and easy maintenance. Due to the number of plug contacts, the structure of the heating device can be adapted or optimized as required. If the plug-in contact distributor has, for example, eight plug-in contacts, either one housing section with eight heating elements or two housing sections with four heating elements each can be heated. The number of plug contact distributors can be optimized by the number of plug contacts.
  • a heating device ensures flexible use and easy maintenance.
  • the fixed, i.e. insoluble, mechanical one and electrical connection between the supply line and the plug-in contact distributor ensures a high level of personal protection. Due to the permanent connection of the electrical supply line to the plug-in contact distributor and optionally to a supply line contact plug, these form a supply unit.
  • the respective supply unit forms a module of the heating device.
  • a heating device ensures flexible use and easy maintenance.
  • the heating elements can be changed easily and as required by any operator. In particular, no electrician is required to change a heating element.
  • the heating element can be mechanically and electrically disconnected by an operator in a simple manner by unplugging the contact plug from the plug contact. The operator can then mechanically and electrically conductively reconnect a heating element to the plug-in contact distributor by inserting the associated contact plug into the plug-in contact. The heating elements can thus be easily disconnected from the power supply and reconnected.
  • a heating device ensures flexible use and easy maintenance.
  • the supply unit forms a module of the heating device that can be easily replaced.
  • the plug-in contact distributor is preferably fixed and/or detachable with the associated supply line and/or the supply line is fixed with an associated supply line contact plug tied together.
  • the supply unit is designed for a rated voltage of at least 200 V, in particular at least 380 V, and in particular at least 460 V.
  • the nominal voltage is preferably between 200 V and 480 V.
  • a heating device ensures flexible use and easy maintenance.
  • the respective heating unit forms a module of the heating device that can be easily replaced.
  • At least two, in particular at least three, and in particular at least four heating units are preferably assigned to a supply unit.
  • the at least two heating units assigned to a supply unit are designed identically and/or differently.
  • the at least two heating units can have an identical nominal heating capacity and/or different nominal heating capacities.
  • the respective heating unit is designed for a rated voltage of at least 200 V, in particular at least 380 V, and in particular at least 460 V.
  • the nominal voltage is preferably between 200 V and 480 V.
  • a heating device ensures flexible use and easy maintenance.
  • the protection class ensures a high level of personal protection.
  • the standard DIN EN 60529 applies in particular to the protection class.
  • the protection class ensures in particular that a component and/or a module of the heating device can be replaced by any operator. An electrician is not required for the replacement.
  • a heating device ensures flexible use and easy maintenance.
  • the respective switching element can be controlled by means of a data bus through the at least one data bus connection.
  • all switching elements can be controlled by means of a data bus or a data bus line.
  • the data bus line connects all switching elements to one another.
  • the data bus is designed as a field bus, for example.
  • the plug-in contact distributors of a plurality of heating devices are preferably connected in series by means of a data bus line, so that switching elements integrated in the plug-in contact distributors can be controlled by means of the data bus line or the data bus.
  • the at least one switching element is connected to the data bus line in particular by means of a piercing contact. When the data bus line is clamped, a piercing contact penetrates the outer casing of the data bus line and forms a contact for data transmission.
  • a heating device ensures flexible use and easy maintenance.
  • the at least one measuring sensor can be used, for example, to measure and monitor the current consumed by the at least one heating element. Deviations from a target current consumption can be determined by measuring and monitoring the current consumption. As a result, a failure of a heating element can be detected at an early stage.
  • the at least one measuring sensor is designed in particular as a current measuring sensor.
  • the at least one measuring sensor is preferably integrated in an associated switching element.
  • the at least one switching element preferably makes it possible to monitor whether a heating element is connected and functional.
  • a heating device ensures flexible use and easy maintenance.
  • the supply line of a further heating device can be connected to the plug-in contact distributor, so that by means of the Supply lines can be connected to the plug contact distributor in series and in this way the power supply from heater to heater can be performed.
  • the supply line belonging to the plug-in contact distributor is detachably or permanently connected to the plug-in contact distributor.
  • the respective plug-in contact distributor preferably has two supply line connections, so that its own supply line and the supply line of a further heating device can be detachably connected to the plug-in contact distributor. As a result, the amount of cabling can be easily optimized.
  • the invention is also based on the object of creating a screw machine with at least one heating device for at least one housing section, which can be used flexibly and is easy to maintain.
  • the screw machine is preferably a multi-shaft screw machine, in particular a two-shaft screw machine.
  • the multi-shaft screw machine comprises at least two housing bores that penetrate one another and in each of which a treatment element shaft is rotatably arranged.
  • the at least two treatment element shafts can preferably be driven in rotation in the same direction of rotation and/or are designed to mesh tightly with one another.
  • the screw machine preferably has several heating devices.
  • the heating devices can be constructed identically and/or differently. The heating devices can differ, for example, in the number of heating elements and/or in the nominal heating power.
  • the screw machine is, for example, part of a device for processing material.
  • the device comprises a base on which the screw machine is arranged.
  • the device preferably comprises an electric drive motor and a gearbox which are arranged on the base.
  • the plug-in contact distributor, in particular the supply unit, of the at least one heating device is preferably arranged on the subframe, in particular at a distance from the screw machine.
  • a line duct can be arranged and/or formed on the underframe.
  • the supply unit is arranged in particular on the line duct and/or in the line duct.
  • a screw machine ensures flexible use and easy maintenance of the at least one heating device. Because the at least two electrical heating elements are connected to the plug-in contact distributor via the associated connecting lines and contact plugs, the plug-in contact distributor can be arranged at a spatial distance from the at least one housing section and the connecting lines can be routed in the desired manner, so that neither the plug-in contact distributor nor the Connection lines or the heating elements impede the arrangement of at least one thermal insulation hood.
  • the dismantling of the at least one thermal insulation hood is easily possible since the at least one heating device or a component of the at least one heating device does not have to be dismantled for this purpose. After dismantling the at least one thermal insulation hood, the at least one heating device is freely accessible, so that the at least one heating device is in the required position way can be serviced or maintained. In particular, a defective heating element can be replaced in a simple manner.
  • the at least one thermal insulation hood is in particular U-shaped and/or designed in one piece. This ensures flexible use and easy maintenance of the at least one heating device. Since the at least one heating device does not impair the structure and the arrangement of the at least one thermal insulation hood, the at least one thermal insulation hood can be U-shaped and/or designed in one piece. As a result, the at least one thermal insulation hood can be used in a simple manner in connection with the at least one heating device. In particular, the at least one thermal insulation hood can be dismantled as a whole in a simple manner, so that the at least one heating device is freely accessible for servicing or maintenance.
  • a gap is formed between the at least one thermal insulation hood and the housing, the at least two connecting lines being routed to the plug-in contact distributor through the gap.
  • This ensures flexible use and easy maintenance of the at least one heating device. Since a gap is formed between the at least one thermal insulation hood and the housing, the at least two connection lines can be routed in a simple manner from the associated heating elements through the gap to the associated plug-in contact distributor.
  • the arrangement of the at least one thermal insulation hood is thus not affected by the at least one heating device, so that the at least one heating device can be used easily and flexibly in connection with the at least one thermal insulation hood.
  • the at least one thermal insulation hood can be simpler Way, be dismantled, in particular by lifting, so that the at least one heater for maintenance or repair is freely accessible.
  • the invention is also based on the object of creating a method for easy maintenance of a heating device for at least one housing section of a screw machine.
  • the method according to the invention can in particular also include the step of providing a screw machine according to at least one of claims 12 and 13.
  • the advantages of the method according to the invention correspond to the advantages already described of the heating device according to the invention and the screw machine according to the invention.
  • the device 1 shown for processing material comprises a multi-shaft screw machine 2 which can be driven in rotation by a drive motor 3 via a gear 4 .
  • the multi-shaft screw machine 2, the drive motor 3 and the gear 4 are mounted on a base 5.
  • the multi-shaft screw machine 2 is supported on the base 5 via supports 6 .
  • the multi-shaft worm machine 2 comprises a housing 7 which is constructed from a number of housing sections 8 which are connected to one another by means of flanges 9 .
  • the housing 7 has two penetrating housing bores 10, 11, which have the shape of a figure eight in cross section.
  • Arranged in the housing bores 10, 11 are two treatment element shafts 12, 13 which are designed to mesh tightly and can be driven in rotation about associated axes of rotation 14, 15 in the same directions of rotation.
  • a feed opening 16 is formed in the first housing section 8 for feeding the material to be processed into the housing bores 10 , 11 .
  • the material is transported and processed in a conveying direction 17 by means of the treatment element shafts 12 , 13 .
  • the processed material is discharged through a discharge opening 19 formed in a nozzle plate 18 .
  • the end of the nozzle plate 18 is fastened to the last housing section 8 .
  • the multi-shaft screw machine 2 comprises a respective electrical heating device 20 for at least individual housing sections 8.
  • the heating devices 20 are of identical design, so that only one of the heating devices 20 is described below.
  • the heating device 20 comprises a supply unit 21 and four associated heating units 22.
  • the heating units 22 are of identical design.
  • the heating units 22 each include an electrical heating element 23 which is mechanically and electrically connected to a contact plug 25 via a connecting line 24 .
  • the respective connection line 24 is fixed, ie mechanically and electrically non-detachable, connected to the associated heating element 23 and the associated contact plug 25 .
  • the respective connection line 24 can therefore not be separated from the heating element 23 and the contact plug 25 without being destroyed.
  • the respective connection line 24 is flexible, ie bendable.
  • the respective heating element 23 is designed, for example, as an electrical resistance heating cartridge.
  • the heating units 22 are connected to the supply unit 21 .
  • the supply unit 21 comprises a plug contact distributor 26, an electrical supply line 27 and a supply line contact plug 28.
  • the supply line 27 is mechanically and electrically connected to the plug contact distributor 26 and the supply line contact plug 28.
  • the supply line 27 is flexible, ie designed to be bendable.
  • the supply line 27 is fixed, ie mechanically and electrically undetachable, connected to the plug contact distributor 26 and the supply line contact plug 28 .
  • the supply line 27 can therefore not be separated from the plug contact distributor 26 and the supply line contact plug 28 without being destroyed.
  • the plug-in contact distributor 26 comprises a plug-in contact distributor housing 29 in which an electrically conductive distributor element 30 is arranged.
  • the distributor element 30 is electrically conductively connected to the supply line 27 .
  • the distributor element 30 is electrically conductively connected to four plug contacts 31 via respective switching elements 42 .
  • the plug contacts 31 are arranged on an outside of the plug contact distributor housing 29 and are therefore freely accessible.
  • the switching elements 42 enable the power supply to be switched on and off at the associated plug contacts 31 .
  • the switching elements 42 are connected to a data bus line 43 integrated in the plug contact distributor 26 .
  • the data bus line 43 is connected to data bus connections 44,45.
  • Each of the heating units 22 is plugged into one of the plug contacts 31 with the associated contact plug 25 .
  • the respective Contact plug 25 mechanically and electrically conductively connected to the associated plug contact 31.
  • the supply unit 21 and the heating units 22 have at least protection class IP 54, in particular at least protection class IP 64, and in particular protection class IP 67.
  • the plug-in contact distributor 26 or the plug-in contacts 31 and the associated contact plug 25 for forming the plug-in contact connection have the protection class mentioned.
  • the associated housing section 8 has receiving recesses 32 for receiving the heating elements 23 .
  • the receiving recesses 32 are formed between the flanges 9 and run essentially perpendicular to the housing bores 10, 11.
  • the number of receiving recesses 32 corresponds to the intended number of heating elements 23 of the heating device 20.
  • the housing section 8 has, for example, four receiving recesses 32, with two receiving recesses 32 above the housing bores 10, 11 and spaced apart in the conveying direction 17 and two receiving recesses 32 below the housing bores 10, 11 and spaced apart in the conveying direction 17.
  • the heating elements 23 are inserted into the associated receiving recesses 32 and attached to the housing section 8 .
  • the multi-shaft screw machine 2 has thermal insulation hoods 33 for thermal insulation.
  • the thermal insulation hoods 33 are in 1 shown cut. In the 2 and 3 one of the thermal insulation hoods 33 is shown in detail.
  • a thermal insulation hood 33 is assigned to each housing section 8 .
  • the respective thermal insulation hood 33 is U-shaped in cross section and has a base 34 and two legs 35 , 36 arranged on the base 34 .
  • the respective thermal insulation hood 33 is designed in one piece, so that it can be assembled or put on and disassembled or lifted off as a whole by means of handles 37 .
  • the respective thermal insulation hood 33 includes an outer shell 38 that delimits an interior space.
  • An insulating material 39 is arranged in the interior space.
  • the outer shell 38 is made of a metallic material, for example.
  • a gap S is formed between the legs 35 , 36 and the respective housing section 8 .
  • the legs 35, 36 have a recessed section, so that the gap S increases in the region of the recessed sections.
  • the connection lines 24 of the heating elements 23 are routed through the gap S in the direction of the base 5 .
  • the supply unit 21 belonging to the heating units 22 is arranged at a distance from the housing 7 .
  • the connecting lines 24 have a length L, with the following preferably applying: 0.5 m ⁇ L ⁇ 5 m, in particular 1.0 m ⁇ L ⁇ 4 m, in particular 1.5 m ⁇ L ⁇ 3 m.
  • the plug contact distributor 26 of the respective supply unit 21 is attached to the base 5 .
  • the associated supply line 27 runs along the base 5, for example in a line duct, to a central power supply 40 with power supply connections 41.
  • the respective supply line contact plug 28 is mechanically and electrically conductively connected to a power supply connection 41 for the power supply.
  • a data bus line 46 which is connected to a control unit 47 , is connected to the data bus connection 44 in order to drive the switching elements 42 .
  • the data bus line 46 can be routed to a further plug contact distributor 26 via the data bus connection 45 .
  • the switching elements 42 can be controlled individually via the data bus line 46, so that the heating elements 23 connected to the plug contacts 31 can be switched on and off individually.
  • the maintenance of one of the heating devices 20 in the event of a defective heating element 23 is described below:
  • the associated supply line contact plug 28 is first mechanically and electrically separated from the energy supply connection 41.
  • the thermal insulation hood 33 covering the first heating element 23 is then removed from the housing section 8 .
  • the first heating element 23 is now freely accessible.
  • the contact plug 25 associated with the first heating element 23 is mechanically and electrically separated from the associated plug contact 31 .
  • the first heating element 23 is detached from the housing section 8 and removed from the receiving recess 32 .
  • the heating unit 22 with the defective heating element 23 is now replaced by a corresponding heating unit 22 with an intact second heating element 23 .
  • the second heating element 23 is inserted into the receiving recess 32 and fixed to the housing section 8 .
  • the contact plug 25 belonging to the second heating element 23 is mechanically and electrically conductively connected to the free plug contact 31 .
  • the thermal insulation hood 33 is now placed back on the housing section 8 .
  • the supply line contact plug 28 is then mechanically and electrically conductively connected again to the energy supply connection 41 .
  • the inventive design of the heating devices 20 heating elements 23 can be replaced individually.
  • the exchange can be performed by any operator. An electrician is not required for the replacement. Due to the modular structure of the heating devices 20, they can be used flexibly.
  • the respective plug-in contact distributor 26 can have a number N of plug-in contacts 31, where the following preferably applies: 4 ⁇ N ⁇ 8.
  • the respective plug contact distributor 26 comprises a first supply line connection 48 and a second supply line connection 49.
  • the supply line 27 of a first plug contact distributor 26 is connected by means of the supply line contact plug 28 to the power supply connection 41 of the central energy supply 40 and by means of a further supply line contact plug 50 to the Supply line connection 48 connected.
  • the supply lines 27 of the further plug contact distributors 26 are each connected to the supply line connection 48 and the supply line connection 49 of the preceding plug contact distributor 26 .
  • the respective supply line 27 is detachably connected to the associated plug-in contact distributor 26 and the adjacent plug-in contact distributor 26 .
  • the supply line 27 can be firmly connected to the associated plug-in contact distributor 26 and can be detachably connected to the adjacent plug-in contact distributor 26 .
  • the supply line 27 of a first heating device 20 is thus connected to the power supply connection 41 of a central power supply 40 and the supply lines 27 of further heating devices 20 are each connected to the plug contact distributor 26 of the previous heating device 20 and thus to the central power supply 40 .
  • the cost of supplying energy to the heating devices 20 can be reduced.
  • the respective switching element 42 includes a current measuring sensor 50.
  • the current measuring sensor 50 is in 7 only illustrated for one of the switching elements 42 for reasons of clarity.
  • the measured values of the respective current measuring sensor 50 are transmitted to the control unit 47 via the data bus.
  • the measured values are evaluated in the control unit 47 so that the function of the heating elements 23 can be monitored and an impending failure of a heating element 23 can be detected at an early stage.
  • the heating device 20 includes a central switching element 42.
  • the switching element 42 is used to switch on and off all of the heating elements 23 connected to the plug contacts 31.
  • the switching element 42 is controlled by the data bus line 46.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Control Of Resistance Heating (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
EP20191700.2A 2019-10-11 2020-08-19 Heizvorrichtung für mindestens einen gehäuseabschnitt einer schneckenmaschine sowie verfahren zur instandhaltung einer derartigen heizvorrichtung Active EP3804955B1 (de)

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EP3804955B1 true EP3804955B1 (de) 2023-05-31

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US (1) US20210111522A1 (ja)
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US4352976A (en) * 1980-09-15 1982-10-05 Mcmullan James P Temperature controlled heater
JPH0929807A (ja) * 1995-07-21 1997-02-04 Mitsubishi Heavy Ind Ltd 成形機の加熱シリンダの自動ヒートアップ方法及びその装置
AT6979U3 (de) * 2004-03-22 2005-01-25 Diglas Wolfgang Heizstab zur entfeuchtung bzw. (aus)trocknung insbesondere von feuchtem mauerwerk
DE102006022646C5 (de) * 2006-05-12 2012-04-05 Leistritz Extrusionstechnik Gmbh Extruderzylindersegment
JP5087654B2 (ja) 2010-04-28 2012-12-05 東芝機械株式会社 成形機の自動昇温制御方法
DE202010006265U1 (de) * 2010-04-30 2010-08-05 Wema Gmbh Heiz-Kühl-Kombination für Extrusionsanlagen
EP2444228B1 (de) * 2010-10-22 2017-07-12 Coperion GmbH Mehrwellenextruder mit Wärmedämmhaube
EP3038804B1 (en) * 2013-08-29 2020-04-22 SABIC Global Technologies B.V. Thermally insulated melt processor, and related process for melt processing a polymer
DE102014109720A1 (de) * 2014-07-10 2016-01-14 Türk & Hillinger GmbH Elektrische Heizvorrichtung mit Steckkontakt
DE102017002830A1 (de) * 2017-01-23 2018-07-26 Liebherr-Hausgeräte Lienz Gmbh Kühl- und/oder Gefriergerät
CN107244056A (zh) * 2017-08-16 2017-10-13 成都米特瑞新材料科技有限公司 利于均匀加热的挤出机构

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CN112643997A (zh) 2021-04-13
EP3804955A1 (de) 2021-04-14
JP7149315B2 (ja) 2022-10-06
JP2021062612A (ja) 2021-04-22
CN116587572A (zh) 2023-08-15
DE102019215700A1 (de) 2021-04-15
US20210111522A1 (en) 2021-04-15

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